UV-ray irradiation never causes amorphization of crystalline CO2: A transmission electron microscopy study

被引：11
|
作者：
Tsuge, Masashi [1 ]
Thanh Nguyen [1 ]
Oba, Yasuhiro [1 ]
Hama, Tetsuya [2 ]
Kouchi, Akira [1 ]
Watanabe, Naoki [1 ]
机构：
[1] Hokkaido Univ, Inst Low Temp Sci, Sapporo, Hokkaido 0600819, Japan
[2] Univ Tokyo, Komaba Inst Sci, 308-1 Komaba, Tokyo 1538902, Japan
来源：
CHEMICAL PHYSICS LETTERS | 2020年 / 760卷
基金：
日本学术振兴会;
关键词：
Astrochemistry; Cosmic ice; Transmission electron microscopy; Infrared spectroscopy;
D O I：
10.1016/j.cplett.2020.137999
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The Crystallinity of ices, amorphous and crystalline, can be altered not only by heat but also by irradiation of UV rays or charged particles. In this work, the effect of UV-irradiation on the crystallinity of CO2 ice was investigated by using a transmission electron microscope. A crystalline CO2 ice was produced by annealing amorphous CO2 ice. We found that UV-ray irradiation of CO2 crystals at approximately 10 K does not cause amorphization in contrast to the reported amorphization of crystalline water ice below 70 K. We discuss the difference based on the expected UV photochemistry of CO2 ice.
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页数：6
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